1. Kinship Organization Bunun society forms an extended family from the family concept. With several patriarchic extended families, they form a sub-clan, i.e. phratry or clan, to share hunting sites and the clan honor and disgrace.
2. Family and Marriage Bunun are patriarchic, featuring living with the father and patriarchic succession. An extended family is formed by two or more generations, i.e. a big family usually with up to 30 to 40 members. While patrilocality is practiced, seniors of the family will decide on marriages across clans. Currently, the percentage of cross-clan marriages is rising. Although the original Bunun marriage system is very stringent, this system began to collapse with the impacts from religion, culture, social habits, and different dominating cultures.
3. Tribal Organization Bunun people used to live separately by family. After the mass relocation during Japanese colonization, a shared maintenance and operation model among family seniors (madadaingaz), priests (mapuadahu), sorcerers (is-am-aminan), and troop leaders (lavian) has been extinguished. Taking charge of tribal foreign affairs, including political affairs and military operations such as negotiation and alliances among tribes and settlements and enemy hunting, the troop leader (lavian) must have distinguished achievements in war, good knowledge in military and geography, courage, and attack and defense skills. Taking charge of tribal home affairs, such as annual rituals and life rituals, and mediation of disputes among individuals, families, and clans, the tribal priest (mapuadahu) is equipped with rich knowledge in agriculture and meteorology and is familiar with all types of rituals and ceremonies. In different locations, the same person may take different roles at the same time.